- Joined
- Apr 15, 2006
- Messages
- 10,695
- Car(s)
- EK9/Civic
Well, the answer is simple, the oil loses viscosity (and other protective aditives etc) causing engine wear, thats why honda recommends changing the oil disregarding how many miles you put on the engine.
Lets get technical:
Well today I want to share with you guys this photo:
It looks like the oil has been running on the engine for about 10,000 miles right?
WRONG
I used the oil for about 500 miles, but it has been running on my motor for about 11 months.
Some mechanics tell you that you can change your oil every 3500, 7000 miles (depending on driving conditions) and that it doesn't matter if you run the same oil for more than 6 months.
But now you can prove them they're wrong
Change your oil every 6 months guys!!
Lets get technical:
Shear stability is a measure of the amount of viscosity an oil may lose during operation. Oil experiences very high stresses in certain areas of the engine such as in the oil pump, cam shaft area , piston rings, and any other areas where two mating surface areas squeeze the oil film out momentarily . Most multigrade engine oils contain special types of additives, called Viscosity Index Improvers, which are composed of very large, viscosity-controlling molecules. As the oil passes through the engine, these molecules are permanently sheared or torn apart over time, causing the additive to lose its viscosity-contributing advantages which reduces the oils ability to maintain its higher number. for example 10w30.
Synthetic Oils do not rely as much on special Viscosity Index Improver additives and will experience little permanent viscosity loss.
Well today I want to share with you guys this photo:
It looks like the oil has been running on the engine for about 10,000 miles right?
WRONG
I used the oil for about 500 miles, but it has been running on my motor for about 11 months.
Some mechanics tell you that you can change your oil every 3500, 7000 miles (depending on driving conditions) and that it doesn't matter if you run the same oil for more than 6 months.
But now you can prove them they're wrong
Change your oil every 6 months guys!!